Why Choose the ABB OTP45B4U 45 A 4-Pole IP65 Enclosed Switch Disconnector?
The ABB OTP45B4U is a robust 4-pole plastic enclosed switch disconnector designed for local electrical isolation and load switching in industrial machinery, motor control systems and low-voltage electrical installations. Part of the ABB OTP enclosed switch range, it combines reliable manual operation with a protective enclosure and a black rotary selector handle.
Featuring an IP65-rated, UV-protected plastic enclosure, the OTP45B4U provides protection against dust and low-pressure water jets. Its blank cable entry arrangement without preformed knock-outs allows installers to prepare cable openings according to the requirements of the installation, offering flexibility when selecting cable glands and entry positions.
Identified by ABB order code OTP45B4U and manufacturer product ID 1SCA115872R1001, this switch provides a 45 A AC-23A operational current rating at 415 V AC, a 63 A AC-22A rating and a 22 kW AC-23A motor switching capability at 415 V AC. Its four-pole construction makes it suitable for electrical installations requiring simultaneous switching of three phase conductors and a neutral conductor.
Key Advantages
- 45 A AC-23A enclosed switch disconnector for industrial electrical applications.
- 4-pole switching configuration suitable for three-phase and neutral isolation.
- 22 kW motor switching capability at 415 V AC under AC-23A utilisation conditions.
- IP65-rated plastic enclosure protects against dust and low-pressure water jets.
- Blank cable entries without knock-outs allow customised cable entry preparation.
- Black rotary selector handle provides clear manual ON/OFF operation.
- Padlockable operating handle supports controlled isolation during maintenance.
- Interlocked enclosure cover helps restrict access during normal operation.
- UV-protected enclosure suitable for appropriately installed indoor and outdoor applications.
- Neutral and protective earth terminals support electrical installation.
- Compatible with optional auxiliary contact arrangements for control and indication.
- Part of the established ABB OTP plastic enclosed switch-disconnector range.
Key Features
- ABB OTP45B4U enclosed switch disconnector.
- 4-pole main switching arrangement.
- 45 A AC-23A operational current at 415 V AC.
- 63 A AC-22A operational current at 415 V AC.
- 22 kW AC-23A motor switching capability at 415 V AC.
- IP65 enclosure protection rating.
- Black selector-type operating handle.
- Padlock-compatible operating mechanism.
- Cover interlocking with defeatable interlock function.
- Blank cable entry surfaces without factory-formed knock-outs.
- UV-protected plastic enclosure.
- Neutral and protective earth terminals included.
- No auxiliary contacts fitted as standard.
- Supports up to 2 normally open and 2 normally closed auxiliary contacts with suitable accessories.
- Manual ON/OFF switching operation.
- Suitable for local electrical isolation and load-break switching.
Technical Specifications
- Manufacturer: ABB
- Series: OTP Plastic Enclosed Switches
- Model: OTP45B4U
- ABB order code: OTP45B4U
- ABB manufacturer product ID: 1SCA115872R1001
- Product group: Plastic Enclosed Switches (OTP)
- Product type: Enclosed switch disconnector
- Rated operational current AC-23A: 45 A at 415 V AC
- Rated operational current AC-22A: 63 A at 415 V AC
- AC-23A motor switching power: 22 kW at 415 V AC
- AC-23A motor switching power at 690 V: 15 kW
- AC-23A operational current at 690 V: 20 A
- Number of poles: 4
- Switching configuration: Three-phase plus switched neutral
- Switching function: Manual ON/OFF isolation and load switching
- Enclosure protection rating: IP65
- Enclosure material: Plastic
- Enclosure UV protection: UV-protected
- Operating handle: Black selector handle
- Padlocking: Padlock-compatible
- Cover interlocking: Interlocked, defeatable
- Cable entry configuration: Blank top and bottom entries
- Preformed cable knock-outs: None
- Auxiliary contacts included: None
- Maximum auxiliary contact configuration: 2 NO + 2 NC
- Neutral terminal: Included
- Protective earth terminal: Included
- Enclosure height: 200 mm
- Enclosure width: 145 mm
- Enclosure depth: 90 mm
- Dimensions (H × W × D): 200 × 145 × 90 mm
- Approximate weight: 1.0 kg
- Application: Industrial machinery and electrical equipment isolation
Reliable Four-Pole Isolation for Industrial Machinery and Electrical Distribution
Enclosed switch disconnectors such as the ABB OTP45B4U provide a manually operated means of disconnecting electrical equipment from its power supply. The switch uses a mechanical switching mechanism to open or close its main contacts, allowing operators and maintenance personnel to isolate connected machinery before inspection, servicing or repair.
The four-pole configuration allows simultaneous switching of three phase conductors and a neutral conductor in compatible electrical installations. This makes the OTP45B4U suitable for applications where the installation design requires four-pole isolation. The black rotary handle provides direct manual operation, while its padlock compatibility supports maintenance isolation procedures.
The IP65 plastic enclosure helps protect the switching assembly from dust and water ingress. Unlike versions with factory-formed cable knock-outs, the OTP45B4U features blank cable entry surfaces, allowing suitable cable entry openings to be prepared during installation. Cable glands and sealing arrangements must be selected and fitted correctly to maintain the required enclosure protection rating.
For motor control applications, the switch should be selected according to the connected motor's full-load current, operating voltage, starting characteristics and applicable utilisation category. Appropriate upstream short-circuit and overcurrent protection must also be provided as part of the electrical installation.
Typical Applications
- Local isolation of three-phase industrial motors.
- Electrical installations requiring four-pole disconnection.
- Industrial machinery isolation and maintenance switching.
- Pumps, fans and ventilation equipment.
- Conveyor and material handling systems.
- Manufacturing and production machinery.
- Packaging and processing equipment.
- Commercial and industrial building services.
- Electrical installations requiring IP65 enclosure protection.
- Installations requiring customised cable gland positions.
- OEM machinery and automation assemblies.
- Replacement of compatible ABB OTP enclosed switch disconnectors.
